I created this unit with our sight word list in mind and the order in which we teach them. This is a 15 pag unit that is progressional in difficulty. Some words are repeated for additional exposure. This center activity mirrors my popcorn center activity (also available for purchase) so students get double exposure of the same words each week. Students will choose three colored pencils (sometimes my kids have used crayons or markers and this is ok too...it's up to you). They will trace each word with the first pencil. Then, trace the words again with the second pencil, then the third. This creates a rainbow word. The kids really love it. This unit should provide a consistent center activity for 15 wks. Thanks!